Fruity, filling and easy to wrap up and slip in your bag just in case.
Self-raising wholemeal flour
Ground mixed spice
Peeled, ripe bananas
Grease and line a 2lb loaf tin (or in my case, squirt Fry Light on the inside of a silicon one).
Simmer dates and water until dates are soft and blitz to a paste. Cool slightly before beating in the egg.
Mix the flour and spice and mash the bananas until smooth. Mix everything together then stir in the walnuts.
Put in the tin, cover with foil and bake at 180 Degrees C (350F, Gas 4) for about an hour, or until a skewer comes out clean: remove foil for last 15 minutes if you want it browned.
Cool and cut into 10 (c230cal) slices, wrap and freeze.